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Lesson 34 of 84 · Inheritance and Traits
ExperimentGenetic Variation in Populations (Part 2)
What You'll Learn
DNA (deoxyribonucleic acid) carries the genetic instructions for building and maintaining an organism. It is shaped like a twisted ladder called a double helix.
Key Words
- parent
- characteristic
Materials Needed
- ruler
- scissors
- microscope (or magnifying glass)
- slides
Safety First
- Keep small objects away from young children.
- Work in a well-ventilated area when using vinegar or other strong-smelling substances.
- Dispose of materials properly after the experiment.
Steps
Step 1 — Read
Read and learn: DNA (deoxyribonucleic acid) carries the genetic instructions for building and maintaining an organism. It is shaped like a twisted ladder called a double helix.
Step 2 — Do
Repeat the experiment two more times for accuracy.
Step 3 — Observe
Observe what happens and describe it in detail.
Step 4 — Record
Record your observations in your science journal.
Check Your Understanding
Question 1
1 of 3What is the shape of DNA?